lv_draw_mask_free_param() function

Free the data from the parameter. It's called inside `lv_draw_mask_remove_id` and `lv_draw_mask_remove_custom` Needs to be called only in special cases when the mask is not added by `lv_draw_mask_add` and not removed by `lv_draw_mask_remove_id` or `lv_draw_mask_remove_custom`